Search SchoolNGR

Saturday, 03 October 2026
Register . Login

Biology Past Questions and Answers

Topic: Soil fertility

Jamb Biology Questions - Soil fertility

Question 11:
A farm practice that result in the loss of soil fertility is
  • A Mixed farming
  • B Bush fallowing
  • C Shifting cultivation
  • D Continous cropping
View Answer & Explanation
Question 12:
The part of a domestic fowl responsible for preventing heat loss is the
  • A Filoplume
  • B Contour feather
  • C Down feather
  • D Quill
View Answer & Explanation
Question 13:
The loss of soil through erosion can be reduced by
  • A Watering
  • B Crop rotation
  • C Manuring
  • D Irrigation
View Answer & Explanation
Question 14:
The part of the mammalian ear responsible for the maintenance of balance is the
  • A Cochlea
  • B Pinna
  • C Perilymph
  • D Vestibular system
View Answer & Explanation
Question 15:
In an experiment to determine the percentage of humus and water in a soil sample, the following results were obtained
Weight of the evaporating basin alone = 80.5g
Weight of basin and soil = 101.5g
Weight after drying the soil in the oven = 99.0g
Weight of basin and roasted soil = 95.5g
The percentage of humus in the soil sample is
  • A 16.7%
  • B 17.6%
  • C 26.7%
  • D 16.2%
View Answer & Explanation